Messages in this thread | | | Subject | Re: [PATCH RESEND] x86/xen: enable early use of set_fixmap in 32-bit Xen PV guest | From | Juergen Gross <> | Date | Mon, 20 Aug 2018 19:05:25 +0200 |
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On 20/08/18 18:56, Boris Ostrovsky wrote: > On 08/20/2018 11:24 AM, Juergen Gross wrote: >> Commit 7b25b9cb0dad83 ("x86/xen/time: Initialize pv xen time in >> init_hypervisor_platform()") moved the mapping of the shared info area >> before pagetable_init(). This breaks booting as 32-bit PV guest as the >> use of set_fixmap isn't possible at this time on 32-bit. >> >> This can be worked around by populating the needed PMD on 32-bit >> kernel earlier. >> >> In order not to reimplement populate_extra_pte() using extend_brk() >> for allocating new page tables extend alloc_low_pages() to do that in >> case the early page table pool is not yet available. >> >> Fixes: 7b25b9cb0dad83 ("x86/xen/time: Initialize pv xen time in init_hypervisor_platform()") >> Signed-off-by: Juergen Gross <jgross@suse.com> >> Reviewed-by: Thomas Gleixner <tglx@linutronix.de> >> --- >> Resending with corrected Fixes: tag >> Boris, please take this via the Xen tree (Thomas asked us to do so) > > > Sure, but we will need to rebase to the latest bits, so you will have to > explain yourself to Linus ;-)
NP for me. At least I hope so. :-)
Juergen
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